I had an uncle who was quite well off and ran an exotic car garage in the US. He had all the insurance, etc. His wife got cancer, insurance wouldn't cover some of the treatment. She died, he went bankrupt, then killed himself.

I'm glad I live in a country where I literally don't even think about treatment or care, it's just not something I worry about. I've had a few relatives in NZ who've had cancer, they've all had excellent care which prolonged their lives and when they passed they didn't leave their survivors with the financial strain in addition to the heartache of losing a loved one.